Guys, I think he means that his in-walls would be mounted in the same wall the couch is up against, and as such firing at the front of the room.
In-walls in the walls to the sides of the couch would be the preferred option, as lovingthehd noted. If that’s not an option I’d go with in-ceiling over the seating rather than in the wall behind the couch firing at the front of the room.
Regards,
Wayne A. Pflughaupt